can fell
Regular verb: fell - felled- felled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fell
you can fell
she can fell
we can fell
you can fell
they can fell 	I can be felling
you can be felling
she can be felling
we can be felling
you can be felling
they can be felling	I can have felled
you can have felled
she can have felled
we can have felled
you can have felled
they can have felled	I can have been felling
you can have been felling
she can have been felling
we can have been felling
you can have been felling
they can have been felling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't fell
you can't fell
she can't fell
we can't fell
you can't fell
they can't fell 	I can't be felling
you can't be felling
she can't be felling
we can't be felling
you can't be felling
they can't be felling	I can't have felled
you can't have felled
she can't have felled
we can't have felled
you can't have felled
they can't have felled	I can't have been felling
you can't have been felling
she can't have been felling
we can't have been felling
you can't have been felling
they can't have been felling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fell?
can you fell?
can she fell?
can we fell?
can you fell?
can they fell? 	can I be felling?
can you be felling?
can she be felling?
can we be felling?
can you be felling?
can they be felling? 	can I have felled?
can you have felled?
can she have felled?
can we have felled?
can you have felled?
can they have felled? 	can I have been felling?
can you have been felling?
can she have been felling?
can we have been felling?
can you have been felling?
can they have been felling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I fell?
can't you fell?
can't she fell?
can't we fell?
can't you fell?
can't they fell? 	can't I be felling?
can't you be felling?
can't she be felling?
can't we be felling?
can't you be felling?
can't they be felling? 	can't I have felled?
can't you have felled?
can't she have felled?
can't we have felled?
can't you have felled?
can't they have felled? 	can't I have been felling?
can't you have been felling?
can't she have been felling?
can't we have been felling?
can't you have been felling?
can't they have been felling?